Details surrounding a murder in an East Nottingham Township home on Dec. 29 are becoming available after Pennsylvania State Police Avondale announced on Dec. 30 that Daniel Proffitt, of the Oxford area, had been arrested for the crime.

He is charged with strangling Anna Johnson, 56, of Oxford, during what he claimed was an argument in a home in the 200 block of Brick Road. Police found Johnson deceased, and Proffitt testified that he killed her in self-defense after she attacked him with a butcher knife.

Proffitt is being held in Chester County Prison in lieu of $750,000 bail, charged with third-degree homicide, voluntary manslaughter and strangulation. A preliminary hearing is scheduled before judge Scott Massey on Jan. 8.

On Jan. 3, The Chester County Coroner’s Office announced that an autopsy revealed that Anna Johnson died from asphyxia by strangulation, with the manner of death being homicide.

Proffitt had been awaiting trial on charges of making terroristic threats in April, when he said he would kill his girlfriend and other people.

According to police, officers arrived at the home on Brick Road on the evening of Dec. 29 for a report of an unresponsive woman. Two officers from Oxford found Proffitt standing outside the home, and he told them that Johnson had attacked him and he had held her down.

Proffitt had recently been released from Lancaster County Prison, where he was held for firearms violations.